Tapered-plug valve.



18?, l 65. Patentvd June 13, 1-916.

J.- N. MOEHN, F. STOK & 0. H. STUEWE.

TAPERED PLUG VALVE.

APPLICATION FILED suuzze, 1915.

a l' I I A adjustment.

zens of the United 2 ED s'rArias Parana:

JOHN N. MOEHN, FRANKSTOCK, AND OSCAR H. STUEWE, OF MILWAUKEE,

@FFKQE.

Wisconsin.

TAPERED-PLU'G VALVE.

To all whom it may concem:

Be it known that we, JonN N. MonHN, FRANKYSTOICK, and Oscar: H. S'rnnwn, citi- States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Tapered-Plug Valves, of Which the following is a specification.

Our invention relates to improvements in tapered plug valves.

The object of our invention is to provide a valve of the described class, which will more effectively prevent leakage of air, steam orother fluid than valves of this type heretofore constructed.

Our improved valve is peculiarly adapted for use as a blow out valve for a boiler, although it may be utilized in any relation where tapered plug valves are employed.

In the drawingsl igure 1 is avertical sectional view of a tapered plug valve embod in" our invention drawn 'to a )lane cutting the axis of the inlet, and partially broken away to a plane cutting one of the packing strips. Fig. 2 is a horizontal sectional view, drawn on line a1-m of Fig. l and partially broken away to a plane on the line y-y of Fig. 1. Fig. 8 is a plan View. Fig. 4 is a fragmentary view, in vertical section, showing a slightly modified form of construction.

Like parts are identified by the same reference characters throughout the several views. 7 A valve casing A has a tapered bore extending through it and is provided with end caps Band C at the top and bottom respectively. The casing is provided with an inlet port 1) in one side thereof, and an outlet port I) at the bottom. A conically tapered plug valve F is seated in said tapered bore and is provided with an elbowed passage or port (l, the inlet (1 of which is adapted to register with the casing inlet port I). The outlete is in constant registry with thecasing outlet port I) .in all positions of valve The interior surface of the wall of the casing A is provided with a set of down- Wardly extending channels, which receive packing members ll. At the lower end of the casing cavity the bore is enlarged annularly to forma recess I in the interior surface of the casing wall, which is adapted to receive a suitable packing ring J. The valve F is provided with a corresponding Specification of Letters Patent.

' F to' project into vent fluid the surface of the valve from port D to the these rings against the walls of the packing cavity, 1'. c. the outer Serial No. 36,447.

annular recess 7' in its outer surface at its smaller end, this recess terminating in the shoulder f which is in substantial registry with the upper wall of the annular channel I. The outlet port E is of suflicient size to permit the lower end of the tapered plug valve it, whereby the valve plug may be moved downwardly from time to time to take up wear. The port (l, including the inlet '0 and the outelt c, is ofsuch size as to allow a free .l'l .v of fluid from the port I).

i it will be observed that thepacking strips are symmetrically disposed in the wall of the casing A. The packing strips flank each side of the inlet port I) and effectually preunder pressure from following port (Z when the valve has been rotated to carry port .1! into registry with or across one of said packing strips H. Fluid is also pre vented from following the surface of the valve downwardly to the outlet port between the packing strips H by the annular pack-- ing ring J.

The valve is provided with an operating stem K of ordinary construction. which pre jects through an aperture in the cap B. The cap B will of course be suitably packed around the stem near the top of the casing where packing of varying thickness may be employed in case it is desired to adjust the valve 1 downwardly to take up wear. The packing ring I; rests upon the top of the valve and also upon the shoulder 1) formed by recessing the interior wall of p at its upper end. The cap B carries a downwardly projecting annulus which seats upon this packing ring. The coupling member or bottom cap C maybe secured to the lower end of the casing. It is provided with an upwardly projecting annulus which bears upon thc'packing ring J. llotlrcaps may be secured in position by a plurality of clamping bolts L. Vhen the clamping bolts L are tightened, the packing rings .l and I) compress them upon the valve and easing shoulders and also tends to spread inner and outer wall of the valve or its stem) and the inner wall of the casing. We therefore have provided an adjustable packing which may be :ulditionally compressed from time to time to take upwcar, and which may he maiu tained under pressure against the walls of Patented June 13, 1916.

the casin 4 the cavities not only at the top and bottom, but at the inner and outer sides also.

We are aware that packing rings have been provided near the lower ends of tapered plug valves, but we believe we are the first to provide means for applying an adjustable clamping pressure thereto and for also providing a structure in which the packing bears against the valve both laterally and vertically, and particulaply in which such bearing is secured under pressure. lVe also believe we are the first to provide means whereby packing rings may be clamped against such a valve at both ends thereof.

We claim- 1. lhe combination with a valve casing having a tapered /bore extending therethrough and a side inlet port communicating with said bore, of a tapered plug valve seated in said b re and provided with a port adapted at ore end for registry with the inlet port, and at the other end leading through thr/ smaller end of the valve, the oppos ng surfaces of the valve and casing being annnlarly recessed at said end to pro vide a packing cavity open to the exterior at the end of the valve and easing, a cap covering said end of thecasing and having an outlet ort therein encircled by an annulus pro ecting into said cavity, and an apertured packing interposed between said an-- nulus and ,the walls of the cavity with the smaller end of the valve projecting through it into the outlet port, substantially as described.

2. The combination with a tapered plug valve having an elbowed passage extending inwardly from one side of the valve and outwardly through the smaller end thereof, said end of the valvehaving its exterior wall recessed and adapted to cooperate with a casing to form a packing receiving cavity,

. a casing in which said valve'is seated, provided with an inlet port with which the inlet end of the valve port may register, and

' having an opening through which. the

smaller end of the valve projects, a cap having an outlet port adapted to receive the projecting end of .the valve, and provided with an annulus extending into said cavity, and adapted to clamp a packing therein between the cap and casing wall, and means for adjustably securing said cap to the easing, substantially as (lQSCI'lbBd,

memes 3. The combination with a valve casing,

of a tapered plug valve seated therein, and.

having an elbowed port leading through one side and the smaller "and of the valve, the opposing walls of said valve and easing being arranged to form an annular packing receiving cavity at, the smaller end of the valve, an annular packing seated in said and casing being formed to provide open,

annular recesses at their respective ends to receive a' packing, and a set of clamping caps adjustably secured to the casing and each adapted to compress the packing between it and the base of one of said recesses, portions of said valve extending through both of the packing receiving recesses, whereby said packings may be forced inwardly into frictional contact with the sides of said portions of the valve by compressio exerted by the clamping caps.

5. The combination with a casing having a tapered bore extending therethrough, of a tapered plug'valv'e adapted to fit said bore and having an elbowed port extending from one of its side Walls through its smaller end, said bore being enlarged near-the smaller end of the valve to provide an annular recess open atthe outlet end of thecasing, a

clamping member adjustably connected with the casing and provided with an annulus adapted to enter said recess, and a packi g in said recess adapted to be clamped by sai. annulus against the base of the recess.

In testimony whereof we'have afiixed our signatures in the presence of two witnesses.

. 'JQHN N. MUEHN;

FRANK STUCK OSCAR STE'EWE, Witnesses:

Lnvnnn'rr CL WHEELER, linun D. EREMER. 

